diff --git a/application/controllers/GroupController.php b/application/controllers/GroupController.php
index ed30aac86..f852c11b9 100644
--- a/application/controllers/GroupController.php
+++ b/application/controllers/GroupController.php
@@ -1,6 +1,8 @@
 <?php
 /* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
 
+namespace Icinga\Controllers;
+
 use Icinga\Application\Logger;
 use Icinga\Data\DataArray\ArrayDatasource;
 use Icinga\Data\Reducible;